Light echoes are reflections of light from distant objects in space. But what do they look like and how can they best be seen? Sir Patrick Moore and his guests Professor Mike Bode and Dr Tim O'Brien explain all.
Chris Lintott helps to construct a new radio telescope in Hampshire while Pete Lawrence and Paul Abel preview what is on view in the October skies.
The Sky at Night
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The Sky at Night
The Sky at Night: Light Echoes. See link for broadcast times.
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Sky at Night: Ghostly Travellers. See link for details.
Comets are strange and exotic objects, the remnants from dead stars and the birth pangs of our solar system. Only a handful of these ghostly, celestial objects have been seen at close quarters. Sir Patrick Moore discusses NASA's EPOXI mission, which hopes to rendezvous with comet Hartley 2 on November 4th.
David Entwistle
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